Tomographic long-distance microPIV to investigate the small scales of turbulence in a jet at high Reynolds number

TL;DR

This paper introduces a novel tomographic long-distance microPIV technique to effectively measure and analyze the small-scale turbulence in high-Reynolds-number jets, overcoming optical limitations of traditional methods.

Contribution

The study develops and validates a new long-distance microPIV method for detailed 3D turbulence analysis in large flow domains at high Reynolds numbers.

Findings

Validated the performance of the long-distance microPIV technique.

Provided statistical analysis of small-scale turbulence in high-Reynolds-number jets.

Benchmarked data for future applications in small-scale flow phenomena.

Abstract

The small scales of turbulence in a high-Reynolds-number jet ($Re_{\lambda} \approx 350$) are investigated with a \textmu PIV setup to overcome the optical limitations of conventional tomographic PIV setups. With the aim of validating the performances of tomographic long-distance \textmu PIV, analyses are carried out involving statistical aspects of the small scales of turbulence. The technique is assessed and the data are bench-marked to be applied to the analysis of any three dimensional small-scale phenomena in large-scale flow domains.